Sick of missing when people ring on your doorbell? DIYer Daniel Garden was, so he built a system that notifies him on his Pebble smartwatch when someone rings his doorbell.

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Garden's system uses a Raspberry Pi, a Pebble Smartwatch, Pushover, and a few electronics components. When someone rings your doorbell, it triggers the Raspberry Pi, which sends a message through Pushover to the watch. It's a simple solution that's pretty easy to set up on your own. Head over to Garden's site for the full guide.